<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.currentCity}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper"
               v-for="item in hot"
               :key="item.id"
               @click="handleCityClick(item.name)">
            <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div class="area"
           v-for="(item, key) in cities"
           :key="key"
           :ref="key"
      >
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div class="item border-bottom"
               v-for="innerItem in item"
               :key="innerItem.id"
               @click="handleCityClick(innerItem.name)"
          >
            {{innerItem.name}}
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default{
  name: 'CityList',
  props: {
    cities: Object,
    hot: Array,
    letter: String
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  data () {
    return {}
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  }
}
</script>

<style type="text/css" lang="scss" scoped>
  .border-topbottom {
    &:before {
      border-color: #ccc;
    }
    &:after {
      border-color: #ccc;
    }
  }

  .border-bottom {
    &:before {
      border-color: #ccc;
    }
  }

  .list {
    overflow: hidden;
    position: absolute;
    top: 1.58rem;
    left: 0;
    right: 0;
    bottom: 0;
    .title {
      line-height: .55rem;
      background: #eee;
      padding-left: .2rem;
      font-size: .26rem;
    }
    .button-list {
      overflow: hidden;
      padding: .1rem .6rem .1rem .1rem;
      .button-wrapper {
        float: left;
        width: 33.33%;
        .button {
          padding: .1rem 0;
          text-align: center;
          margin: .1rem;
          border: .02rem solid #ccc;
          border-radius: .06rem;
        }
      }
    }
    .item-list {
      .item {
        line-height: .76rem;
        color: #666;
        padding-left: .2rem;
      }
    }
  }

</style>
